Re: [flexcoders] += operator is changing the encodings

Luis Eduardo Sat, 28 Oct 2006 09:31:20 -0700


  wow gordon!
  i am completly newbie on flex but understood perfectly your explanations!


  this should be putted on the help of += operator  :)

  thank you very much dude!


  []'s

       Luís Eduardo



Gordon Smith escreveu:

> You're running into a difference between an XMLList (a built-in E4X 
> type, along with the XML type) and XMLListCollection (a Flex framework 
> type).
>
>  
>
> If the right-hand-side (RHS) of the E4X += operator is an XML instance 
> or an XMLList instance, it inserts children as you are expecting.
>
>  
>
> For example, suppose var x:XML = <a><b/></a>.
>
>  
>
> Then x.b += <c/> sets x to <a><b/><c/></a>. (This is the case where 
> RHS is an XML instance.)
>
>  
>
> And x.b += <><c/><c/></> sets x to <a><b/><c/><c/></a>. (This is the 
> case where RHS is an XMLList instance.)
>
>  
>
> (Note that you can't write an XMLList literal as <c/><c/>; it doesn't 
> compile. You  wrap the nodes of the list between <> and </>.)
>
>  
>
> However, if the RHS is any other type, then it calls toString() on the 
> RHS and inserts it as text, not as child nodes.
>
>  
>
> For eample, x.b += "foo" sets x to <a><b>foo</b></a>.
>
>  
>
> You can't have < and > in XML text, so they get converted to the XML 
> escape entities &lt; and &gt;
>
>  
>
> For example, x.b += "<c/>" sets x to <a><b>&lt;c/&gt; </b></a>.
>
>  
>
> Since E4X doesn't know about XMLListCollection, it treats it like any 
> other type and converts your XMLLC to a string and then escapes it. I 
> don't know of any way to directly convert an XMLListCollection to an 
> XMLList without looping over the items, which is similar to what 
> you're doing extract one XML from the XMLListCollection at a time.
>
>  
>
> - Gordon
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] 
> *On Behalf Of *Luis Eduardo
> *Sent:* Wednesday, October 25, 2006 12:33 PM
> *To:* flexcoders@yahoogroups.com
> *Subject:* Re: [flexcoders] += operator is changing the encodings
>
>  
>
>
>
> Igor,
>
> thx for your answer, but i think something isnt clear...
>
> my problem is on the += operator in this line of code:
>
> xgravar.root.request += XMLLC;
>
> the XMLLC object is declared as:
>
> <mx:XMLListCollection id="XMLLC"
> collectionChange="collectionEventHandler(event)"/>
>
> and have, at the time this line of code fire, the follow XML
>
> <TipoVeiculo Id="1" Nome="Moto" Descricao="desc">
> <TipoVeiculo Id="2" Nome="Carro" Descricao="desc">
> <TipoVeiculo Id="3" Nome="Caminhao" Descricao="desc">
> <TipoVeiculo Id="4" Nome="Aviao" Descricao="desc">
>
> just that. (without a root node).
>
> the root node is at "xgravar.request".
>
> but, when i do:
>
> xgravar.root.request += XMLLC;
>
> and after Alert.show(xgravar.toXMLString()) the code is changed to:
>
> <ds>
> <root>
> <request>
> &ltTipoVeiculo Id="1" Nome="Moto" Descricao="desc"&gt
> &ltTipoVeiculo Id="2" Nome="Carro" Descricao="desc"&gt
> &ltTipoVeiculo Id="3" Nome="Caminhao" Descricao="desc"&gt
> &ltTipoVeiculo Id="4" Nome="Aviao" Descricao="desc"&gt
> </request>
> </root>
> </ds>
>
> i have made a workaround for this with the follow code:
>
> for each( var item : XML in XMLLC ) {
> XML(xgravar.root.request).appendChild(item);
> }
>
> but i think that the += operator SHOULD do the same thing WITHOUT
> changing the < and > simbols.
>
> dont you agree?
>
> best regards to you!
>
> Luís Eduardo.
>
> Igor Costa escreveu:
>
>> Hi Luiz
>>
>>
>> Isn't the operator that's wrong, you just missed out how to pass
>> String and concatening in both side of wall.
>>
>> Check out this heck of how could be done.
>>
>> public function myList():void
>> {
>> var myXML = new
>> XMLList("<dsRQ><root><request/></root></dsRQ>");
>> szCommand = "insert";
>> if( [EMAIL PROTECTED] = szCommand == true)
>> {
>> Alert.show(xgravar.toString());
>> }
>> else {
>> Alert.show(xgravar);
>> }
>> }
>>
>>
>> The problem is, you are trying to convert an object twice in time in
>> the same function, that's why the problem happens. if you put anything
>> in braces <> than you convert to string, the compiler intend to
>> undrestand that, "ok the users now want to convert that cacharecter".
>>
>>
>> Regards.
>>
>> szCommand = "insert";
>> [EMAIL PROTECTED] = szCommand;
>>
>> Alert.show(XMLLC.toXMLString()); // OK here. all < and >
>> works fine
>>
>> xgravar.root.request += XMLLC;
>>
>> Alert.show(xgravar.toXMLString()); // ERROR here. < and >
>> converted to &lt and &gt
>> }
>>
>>
>>
>>
>>
>>
>>
>> On 10/24/06, *Luis Eduardo* <[EMAIL PROTECTED] 
> <mailto:illogic_code%40yahoo.com.br>
>> <mailto:[EMAIL PROTECTED] 
> <mailto:illogic_code%40yahoo.com.br>>> wrote:
>>
>>
>> hi,
>>
>> In my app, when i use the += operator, the data inside xmls turns
>> with
>> diferent encoding.
>> The < and > caracters become wierds like &lt and &gt respectively.
>>
>> How can i fix this?
>>
>> this is the code:
>>
>> public function doGravar():void {
>> var xgravar:XMLList = new
>> XMLList("<dsRQ><root><request/></root></dsRQ>");
>>
>> szCommand = "insert";
>> [EMAIL PROTECTED] = szCommand;
>>
>> Alert.show(XMLLC.toXMLString()); // OK here. all < and >
>> works fine
>>
>> xgravar.root.request += XMLLC;
>>
>> Alert.show(xgravar.toXMLString()); // ERROR here. < and >
>> converted to &lt and &gt
>> }
>>
>> where XMLLC : XMLListCollection and szCommand : String.
>> The first Alert will show correct data but the second will show
>> caracters converted.
>>
>> regards,
>>
>> Luís Eduardo.
>>
>>
>> _______________________________________________________
>> Novidade no Yahoo! Mail: receba alertas de novas mensagens no seu
>> celular. Registre seu aparelho agora!
>> http://br.mobile.yahoo.com/mailalertas/ 
> <http://br.mobile.yahoo.com/mailalertas/>
>> <http://br.mobile.yahoo.com/mailalertas/ 
> <http://br.mobile.yahoo.com/mailalertas/>>
>>
>>
>>
>>
>>
>> --
>> ----------------------------
>> Igor Costa
>> www.igorcosta.com <http://www.igorcosta.com <http://www.igorcosta.com>>
>>
>
>
> _______________________________________________________
> O Yahoo! est de cara nova. Venha conferir!
> http://br.yahoo.com <http://br.yahoo.com>
>
>  




                
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Re: [flexcoders] += operator is changing the encodings

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